HP Pavilion Ultimate d4900 - Desktop PC, Manual

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Safety Information
This product has not been evaluated for connection to
an “IT” power system (an AC distribution system with
no direct connection to earth, according to
IEC 60950).
WARNING: Please read “Safety
Information” in your user documentation
before installing and connecting your
computer to the electrical power system.
Opening and Closing the PC
Preparing the PC
Before you upgrade any component in your PC, you
need to prepare the PC so that you can safely handle
it and the components.
Read the following items before attempting to upgrade
or service the PC:
•
These procedures assume familiarity with the
general terminology associated with personal
computers and with the safety practices and
regulatory compliance required for using and
modifying electronic equipment.
•
Write down and save the PC model and serial
numbers, all installed options, and other
information about the computer. It is easier to
consult the information in this guide than to open
and examine the PC.
•
We recommend that you use an antistatic wrist
strap and a conductive foam pad when working
inside the PC.
WARNING: Always disconnect the modem
cord from the telephone system, and then
disconnect the PC from the power source
before removing the front and side panels
of the PC. Failure to do so before you open
the PC or do any procedures can result in
personal injury or equipment damage.
Before Opening the PC
1 Remove any diskette (floppy disk), memory card
media, or optical disc (CD or DVD) from the PC.
The PC power must be on to remove discs.
2 Click the Start button, and then click Turn Off
Computer . Click Turn Off .
3 Disconnect the modem/telephone cable, if present.
CAUTION: To reduce the risk of personal
injury from electrical shock or hot
surfaces, disconnect the power cord from
the wall outlet, and allow the internal
system components to cool before you
touch them.
4 Disconnect the power cord from the electrical outlet
and then from the PC.
5 Disconnect all other attached cables (such as the
keyboard, mouse, and monitor) and all external
devices.
CAUTION: Static electricity can damage the
electronic components of the PC or
optional equipment. Ensure that you are
discharged of static electricity by briefly
touching a grounded metal object.
Upgrading and Servicing Guide
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